Completion of worksheets included in the following tasks will give evidence of understanding.

Basic concept of cell theory

Cell differentiation

Stems cells ethics and use.

Practical work

Skill of using a microscope

Drawing cells and estimating their size

SA : Volume ratios and cell size

Participation in the debate activities about Stem Cells

Summative

Calculating size and magnification from microscope images.

Learning Activities - Action (attributes will be added to these descriptions)

Using Microscopy to investigate cell theory

Time: 1h A practical Biology lesson that will illustrate the discovery of cells in the history of Biology and teach students how to use microscopes to measure the cell sizes.

Measuring size in Biology

Time: 0.5h How many µm make a mm? This activity gives students clear examples of biological objects to cover sizes from 1mm to 1nm. Students watch a short video clip, investigate a visual biological data base using a slider and make a display which illustrate the huge range of sizes between tiny fleas and the miniscule molecules.

Cell size calculation activities

Time: 1h Student activities to illustrate the sizes of different cell components and to show students how to calculate cell sizes from electron micrographs. The lesson incorporates an online magnification animation and a downloadable worksheet.

Surface area to volume ratio practical

Time: 1h A practical laboratory in which students can visualise diffusion into blocks of different sizes. This will teach students some essential skills for internal assessment, and illustrate the concept of surface area to volume ratio.

Measuring skills, SI units and Uncertainties in Biology

Time: 1h There are some important new skills to learn in IB Biology when it comes to the simple skill of measuring. Professional biologists and IB students are expected to know how precise their measurements are.

This series of short experiments illustrates SI units and the skills a student needs to achieve high grades in data collection and processing.

Being Multicellular

Time: 1h Using video clips this activity explores differentiation, stem cells and emergent properties and gives students an introduction to the concepts together with concrete examples to use in IB examinations.

Critical thinking about stem cells

Time: 1-2hrs This lesson plan contains a range of ides for activities to encourage students to engage with the ethical issues which surround the use of stem cells and therapeutic cloning. Include Stargardt’s disease.

Reflection - considering the effectiveness of the teaching and learning

What worked well (List the content, assessment, planning that were successful)

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What didn't work well (Notes, suggestions, or considerations for the future teaching of this unit)

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